This month’s Patch Tuesday rollout also brought a new monthly rollup for Windows 7, despite this operating system no longer receiving security updates since January last year.

Worth knowing, however, is that these updates are shipped to devices enrolled in the Extended Security Update (ESU) program for paying companies.

The January 2021 rollup is  KB4598279, and in addition to the typical security improvements for the Windows App Platform and Frameworks, Windows Graphics, Windows Media, and Windows Fundamentals, it also corrects an issue affecting the MIT realm.

“Addresses an issue in which a principal in a trusted Managed Identity for Application (MIT) realm does not obtain a Kerberos Service ticket from Active Directory domain controllers (DCs). This issue occurs after Windows Updates that contains CVE-2020-17049 protections released between November 10 and December 8, 2020 are installed and PerfromTicketSignature is configured to 1 or higher. Ticket acquisition… (read more)